The connecting rod transfers the linear up-and-down motion of the piston into the rotational motion of the crankshaft. It is subjected to immense compressive and tensile stresses during the combustion cycle. Mechanics frequently inspect these components for bending, twisting, or bearing wear, which can lead to catastrophic engine failure if left unaddressed.
We found metal shavings in the pan, and it looks like the number three conrod bearing is completely spun.
A bent conrod often results from hydrostatic lock, where liquid enters the cylinder and prevents the piston from completing its stroke.
Also heard as
- connecting rod
Related terms
Big end
The larger end of a connecting rod that attaches to the crankshaft.
Bottom-end
The lower section of an engine block containing the crankshaft, connecting rods, and main bearings.
Piston slap
A knocking sound caused by a piston rocking sideways against the cylinder wall.
Crankwalk
Excessive axial play in an engine crankshaft that allows it to shift back and forth.